Stackable box



FIG. 1 is a top, front and side perspective view of a stackable box embodying my new design.

FIG. 2 is a bottom, back and side perspective view thereof.

FIG. 3 is a front view thereof.

FIG. 4 is a back view thereof.

FIG. 5 is a left side view thereof.

FIG. 6 is a right side view thereof.

FIG. 7 is a top view thereof.

FIG. 8 is a bottom view thereof; and,

FIG. 9 is a cross-sectional view thereof, taken from the line 9-9 in FIG. 7.

The broken lines shown are included for the purpose of illustrating portions of the stackable box that form no part of the claimed design. 

CLAIM The ornamental design for a stackable box as shown and described. 